If you can answer this loaded question in a single sentence, perhaps you should not bother. Just because you would like to see an improvement, does not mean you are ready for the change necessary to make that happen. That doesn't make you a bad person or the goal bad, it just might not be the right time. The reason behind each resolution much be bigger than any obstacle you might face in order for it to consistently rise to the top of your priorities.
I recently read "The Power to Reinvent Yourself" and the first chapter is dedicated to understanding your 'why?' The author contends that you will only change when your 'why' gets bigger than your circumstances, limitations, excuses, etc. So, it doesn't really matter about the how or when until you know why. For instance, he speaks of three generations of women who each grew up in abusive households and vowed 'I will never do x or y to my kids' but then ended up being abusive themselves for different reasons.The cycle didn't break until the loneliness of the author's mom became her 'why'.
If you checked any one of these items, or could check a similar item, it might be time to pull out a pen and pad and rediscover your why. Once you rediscover your why, make sure and keep it visible so you won't forget.